SUMMARY OF SIGNIFICANT ACCOUNTING - EARNINGS PER SHARE - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income [Abstract]
Net earnings, basic	$ 418.0	$ 1,279.1	$ 2,377.3
Net earnings, diluted	$ 418.0	$ 1,279.1	$ 2,377.3
Shares [Abstract]
Outstanding shares, diluted (in shares)	87.6	91.6	97.5
Outstanding shares, basic (in shares)	87.1	91.1	96.7
Dilutive effect of stock options (in shares)	0.5	0.5	0.8
Per Share Amount [Abstract]
Earnings Per Share, Basic	$ 4.80	$ 14.05	$ 24.60
Diluted earnings per share (in dollars per share)	$ 4.77	$ 13.97	$ 24.39